Saw Palmetto, Pygeum, Nettle and Pumpkin seeds are DHT lowering herbs that also lower conversion of androgens into estrogens, and increase free androgens. Free androgens, with the exception of DHT, can turn into estrogens. DHT lowering herbs can have their purposes for breast enhancement, but I don't think they will be effective as a main part of a regimen.
The herbal schedule is based off of typical hormone values during the menstrual cycle. The menstrual cycle often matches with Moon phases. Herbs are categorized according to their effects on breast receptors: ER-alpha, PRB and PrlR. Herbal properties are suggested to enhance the body's typical hormone levels for a potential response for breast enhancement.
For instance, using an abundance of a prolactin herb during ovulation: may cause breast shrinkage, will offset normal menstrual cycles, and an excessive amount of it may be a health risk by interfering with or preventing ovulation when it needs to occur. There is also the case of desensitizing hormone receptors (and bodily responses in general) by creating an excessive or prolonged hormone imbalance, thus increasing the potential for health issues. Read chapters 2 and 3 to understand how creating an excessive imbalance at the wrong time, may have effects other than is intended for that part of the menstrual cycle.
Basic herbs listed, during each time of menstruation, are generally for everyone. The proportions in the herbal schedule are a starting point to tweak your proportions. Strengths of herbs are different, and I based this program with an idea of safety first over efficacy.
Also, everyone is different: some breast responses have plateaued, and some vary in their menstrual cycle by a few days. The times are approximate of herbs listed during ovulation: it doesn't have to fall on the exact day, but it is better if it is slightly before. The correct proportion of herbs during menstruation is one that allows normal menstruation, and breast enhancement: when there is lack of menstruation, add more mint, and when menstruation is too heavy add a prolactin herb.
In many cases, these herbal suggestions cause more breast swelling than normal. This is an indication that the herbs had an effect, but in order for this temporary gain to be sustained, there must be a small amount of receptor antagonism (in other words, a tiny combination of opposing herbs), which is listed for most parts of the schedule. The best way is for the most minimal amounts in proportion to be used. When that balance of proportions is found, increase the amount to a reasonable level. Also, take a break whenever breast enhancement responses stop, or whenever you feel uncomfortable.
Herbs in ground form weigh more than herbs in unground form per the same amount of volume. The way to compare them is to measure weight, and just estimate that weight for volume, a different type of measurement unit.
If you have questions, you can use this form, and I will try my best to answer it: